Question

A thread like structure in the nucleus of a cell formed of DNA which carries the genes is
A. DNA
B. Genes
C. Chromosomes
D. Ribosomes

Answer 1

Hint: The nucleus is defined as a membrane-bound organelle which constitutes eukaryotic organisms' genetic material (DNA). As such, by helping in transcription and replication processes, it helps to preserve the cell's integrity. it can be stained and can be viewed under a microscope.

Complete answer:
Some of a nucleus’s main components are:
1.A membrane with a phospholipid bilayer
2.Nucleoplasm
3.Nucleolus
4.Chromatic
There is absence of a nucleus in some eukaryotic cells and they are termed enucleate cells (e.g.
erythrocytes), while others can have more than one nucleus (e.g. slime moulds). In the nucleus, threadlike structures made up of DNA strands and histone proteins.

Now let us find solution from given options:
A.DNA: it is also known as deoxyribose nucleic acid. They are genetic material of many organisms. They are present inside chromosomes. They behave as information sources from one generation to another.
B.Genes: these are also present inside chromosomes or on chromosomes. There are many pairs of genes that are inherited during the time of child birth. The genes include genes of eyes colour, height and many more.
C.Chromosomes: these are thread-like structures that occur in the nucleus. There are 23 pairs of chromosomes in a human which includes 22 pairs of autosomes and one pair of sex chromosomes that is XX in human female and XY in human male.
D.Ribosomes: these are involved in protein synthesis and are circular structures. These are present on endoplasmic reticulum. It is of two types that is 70S and 80S ribosomes.

Hence, the correct answer is option (C)

Note: Since the nucleus has the genetic code of the organism that specifies the amino acid sequence of proteins that are essential to day-to-day operation, it mainly acts as the cell information centre. It was discovered by Robert brown. It contains nuclei. it is present in eukaryotes.